CN201527925U - Indoor high-voltage vacuum circuit breaker - Google Patents

Abstract

The utility model discloses an indoor high-voltage vacuum circuit breaker, which comprises a static contact component, an arc extinguish chamber post terminal, a movable contact component, a frame and an operating mechanism. The operating mechanism is provided with an energy storage mechanism, the energy storage mechanism can realize energy storage electrically and mutually, during an energy storage process, a gear transmission mechanism drives a transmission claw to move and pushes a camshaft to rotate, and a closing spring is pulled out through a crank arm. The operating mechanism is further provided with an opening mechanism and a closing mechanism. Compared with the prior art, the indoor high-voltage vacuum circuit breaker has the following advantages that regardless of normal or fault conditions, the indoor high-voltage vacuum circuit breaker has enough breaking capacity. The indoor high-voltage vacuum circuit breaker is a main auxiliary part of a switch cabinet widely used in a power distribution system, and is particularly adaptable to indoor installation.

Description

Indoor high-voltage vacuum circuit breaker

[technical field]

The utility model relates to generating and for, power transformation technology, is a kind of control of distribution systems such as power plant, electric substation or primary cut-out of protection of being used for, and specifically, is a kind of indoor high-voltage vacuum circuit breaker.

[background technology]

Indoor high-voltage vacuum circuit breaker mainly belongs to the main auxiliary equipment of the widely used switch cubicle of high tension distribution system, adopts three-phase 50Hz, can make the usefulness of the control and the protection of electric installation for industrial and mining enterprises and transformer station, and be applicable to the frequent operation place.

Existing indoor high-voltage vacuum circuit breaker mainly comprises parts such as 3 independent vacuum interrupters of arranging, operating mechanism, vacuum interrupter is installed in the insulating cylinder of tubulose, the insulating cylinder of 3 band arc control device places the front portion of circuit breaker frame (or cabinet), operating mechanism is located at the rear portion of circuit breaker frame, and arc control device are connected by the output toggle arm of insulated tension pole and mechanism.The CN2293893 patent provides integrated indoor high-voltage vacuum circuit breaker, comprise insulating cylinder and cabinet, cabinet is separated into five assembly spaces by four central dividing plates, all parts of operating mechanism are arranged in the cabinet, there is protection face board at the cabinet Qianmen, insulating cylinder is located on the cabinet, constitute one in front and one in back with operating mechanism, the console mode structure of three-phase packing, vacuum interrupter is arranged in the insulating cylinder of sealing, be equipped with respectively at the top of insulating cylinder and middle part, the outlet conductive seat, operating mechanism directly is connected with the moving conductive rod of vacuum interrupter, adopts permanent-magnet manipulating mechanism.35 kilovolts of high-pressure vacuum breakers of a kind of single break structure of CN2338870Y patent disclosure, it can be used on the console switch of aspects such as metallurgy, chemical industry as frequent opening and closing.It comprises compositions such as arc control device, support, support bar, conductive clip, guide post, insulated tension pole, rotating shaft, operating mechanism, oil bumper, tripping spring, man-operating mechanism, and each phase insulated tension pole is connected ceramic package vacuum interrupter of actuating by connecting lever with guide post; Connecting lever and guide post are connected on the upper bracket.

[summary of the invention]

The purpose of this utility model is to provide a kind of connecting-disconnecting function strong, and operating reliability is extremely strong, is widely used in the distribution system switch cabinet, is particularly suitable for the high-pressure vacuum breaker of indoor installation.

For achieving the above object, the utility model adopts following technical scheme: a kind of indoor high-voltage vacuum circuit breaker, and it comprises fixed contact assembly, arc interrupter pole, moving contact component, framework and operating mechanism, wherein, operating mechanism is provided with stored energy mechanism, and described stored energy mechanism can electronic, manually be realized energy storage, in the process of energy storage, gear drive drives the driving pawl motion, and the actuating cam axle rotates, and draws back switching-in spring by connecting lever.

Described operating mechanism also is provided with branch, switching-on mechanism.Described switching-on mechanism is under gate-dividing state, if receive switching signal, the moving iron core of combined floodgate release just travels forward, the axle that closes a floodgate is rotated, rotate of the constraint of the sincere son of releasing combined floodgate through the sincere son axle of first four-bar mechanism drive combined floodgate, thereby the energy of switching-in spring is discharged cam, this moment, cam rotated main shaft, by second four-bar mechanism moving block is moved upward, buckle is buckled on the dropout semiaxis and keeps "on" position again, finishes feed motion.

Brake structure was under "on" position in described minute, if receive sub-gate signal, the moving iron core of separating brake release travels forward, the dropout semiaxis is rotated, removed the constraint of make-up plate, indoors under the shake-up pressure and tripping spring tension of high-pressure vacuum breaker, moving block moves downward, main shaft is finished the separating brake action through the spacing gate-dividing state that remains on of buffer buffers at this moment.

The contact of the vacuum interrupter in the described arc interrupter pole is a copper chromium contact, and cup-shaped is indulged magnetic structure.The chassis car is established in the bottom of described indoor high-voltage vacuum circuit breaker framework, promptly forms a circuit breaker cart.

Compared to prior art, the utlity model has following advantage:, all have enough connecting-disconnecting functions no matter be under normal or the failure condition.The utility model is the main auxiliary equipment of the widely used switch cubicle of distribution system, and being specially adapted to indoor peace changes.

[description of drawings]

Fig. 1 is the appearance assumption diagram at the visual angle of the utility model embodiment;

Fig. 2 is the appearance assumption diagram at another visual angle of the utility model embodiment;

Fig. 3 is the cut-away view at the visual angle of the utility model embodiment;

Fig. 4 is the cut-away view at another visual angle of the utility model embodiment;

[embodiment]

Fig. 5 is the operating board structure figure of the utility model embodiment.

Among the figure: 1, combined floodgate release, 2, the separating brake release, 3, first four-bar mechanism, 4, buckle, 5, the sincere son of separating brake, 6, second four-bar mechanism, 7, buffer, 8, the axle that closes a floodgate, 9, the dropout semiaxis, 10, the sincere son axle that closes a floodgate, 11, moving block, 12, connecting lever, 13, wiring board, 14, switch knob, 15, opening button, 16, energy storage motor, 17, switching-in spring, 18, gear drive, 19, sincere son closes a floodgate, 20, cam, 21, tripping spring, 22, main shaft, 23, storage wheel direction board, 24, camshaft, 25, driving pawl.

Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Please refer to Fig. 1 to shown in Figure 5, the utility model is provided with the fixed contact assembly, arc interrupter pole, moving contact component, framework and operating mechanism.Wherein, arc interrupter pole is sealed admittedly through parts such as insulation resilient coating and ceramic vacuum arc control device and turnover line terminals by epoxy resin and is integral, and is provided with before and after arc interrupter pole and the operating mechanism and is fixed on the framework, and framework is as the cabinet of circuit breaker.

Arc quenching principle: the utility model adopts vacuum interrupter, and as arc extinguishing and dielectric, vacuum interrupter has high vacuum degree with vacuum, and the dielectric strength of vacuum is more much higher than the dielectric strength of atmosphere.When dynamic and static contact under the operating mechanism effect during charged separating brake, produce electric current between contact, between contact, will produce vacuum arc, contact surface at high temperature volatilizes metallic vapour, simultaneously because the special construction of contact, in the contact gap, also can produce suitable vertical magnetic field, electric arc is at the effect lower edge of this magnetic field force contact surface tangential direction rapid movement, the part metals of on metallic cylinder, condensing steam, impel vacuum arc to remain diffused, and make electric arc be evenly distributed on the contact surface burning, safeguard low arc voltage; When the electric current natural zero-crossing, residual ion, electronics and metallic vapour just can be compound in the time of the microsecond order of magnitude or be condensed upon on contact surface and the radome, the medium dielectric strength of arc control device fracture is resumed very soon, thereby arc extinction, reach the purpose of disjunction, because this vacuum circuit breaker adopts vertical magnetic field control vacuum arc, thereby has the ability of strong and stable drop-out current.

Operating structure is mainly by stored energy mechanism, compositions such as branch, switching-on mechanism, main shaft, buffer, four-bar mechanism.

The energy storage operating principle of stored energy mechanism: a. is electric energy-stored, and energy storage motor 16 drives driving pawl 25 motions through gear drive 18, and actuating cam axle 24 rotates, and draws back switching-in spring 17 by connecting lever 12, and energy is leaned against on the combined floodgate sincere sub 19 by cam 20 and keeps.Meanwhile, energy storage direction board 23 drives the sensitive switch action, cuts off the power supply of energy storage motor, finishes whole energy storage action.B. manually energy storage is inserted handle hole with the energy storage handle, and swing energy storage handle sees that the energy storage indicia point unloads the energy storage handle after the energy storage from energy storage indication observation window.

The operating principle of branch, switching-on mechanism: a. feed motion, after the stored energy mechanism energy storage, under gate-dividing state, if receive switching signal, the moving iron core of combined floodgate release 1 travels forward, the axle 8 that closes a floodgate is rotated, drive the sincere son axle 10 that closes a floodgate through first four-bar mechanism 3 and rotate the constraint of having removed the sincere sub 19 pairs of cams 20 that close a floodgate, the release of the energy of switching-in spring 17, cam rotates main shaft 22, by second four-bar mechanism 6 moving block 11 is moved upward, have buckle 4 to be buckled on the dropout semiaxis 9 and keep "on" position, finish feed motion.B. separating brake action, under "on" position, if receive sub-gate signal, the moving iron core of separating brake release 2 travels forward, and dropout semiaxis 9 is rotated, and has removed the constraint of make-up plate 4, under the shake-up pressure and tripping spring 21 tension of circuit breaker, moving block 11 moves downward, and main shaft 22 is finished the separating brake action through the spacing gate-dividing state that remains on of buffer buffers.

Please continue with reference to shown in Figure 5, during closing by hand, operator's operating breaker switch knob.When not switching on (charged gas-tight lock and must not carry out closing by hand); During separating brake, operator's operating breaker opening button.Certainly, indoor high-voltage vacuum circuit breaker of the present utility model also can adopt electronic branch, combined floodgate, and wherein, combined floodgate is to make closing coil get electric process, and separating brake is to make switching winding get electric process.When each branch, closing operation, counter all can advance one automatically, observes corresponding position from the panel observation window.

The utility model also is provided with anti-bouncing device, and it mainly acts on and being: after feed motion is finished, in time do not remove as switching signal, the inner anti-jump control circuit of circuit breaker will cut off closing circuit, prevent from repeatedly to close a floodgate.

The utility model also is provided with overflow means, and it mainly acts on and being: under the situation of primary circuit overload or short circuit, make the overcurrent coil get electronic work by overcurrent relay, make breaker open operation, the overcurrent coil has 3.5A and two kinds of situations of 5A.Running current is a reliable separating brake during greater than 110% rated current, must not separating brake during less than 90% rated current.

The contact of the vacuum interrupter in the arc interrupter pole of the present utility model is a copper chromium contact, and cup-shaped is indulged magnetic structure.Establish the chassis car in the circuit breaker frame bottom, promptly form a circuit breaker cart.

A kind of indoor high-voltage vacuum circuit breaker of the utility model should often keep clean, and according to the difference of use occasion and the frequent degree of operation, should do regular inspection to circuit breaker.Every movable friction position all should maintain clean lubricating grease, so that each rotating part flexible movements reduces mechanical wear.In order to prevent contingency, the circuit breaker maintenance work should not carried out under the energy storage state.

A kind of indoor high-voltage vacuum circuit breaker of the utility model, be not restricted to described in specification and the execution mode, therefore for the personnel of familiar field, can easily realize additional advantage and modification, so under the situation of the spirit and scope of the universal that does not deviate from claim and equivalency range and limited, the examples shown that the utility model is not limited to specific details, representational equipment and illustrates here and describe.

Claims (4)

1. indoor high-voltage vacuum circuit breaker, it comprises the fixed contact assembly, arc interrupter pole, moving contact component, framework and operating mechanism, wherein, operating mechanism is provided with stored energy mechanism, it is characterized in that: described stored energy mechanism can electronic, manually be realized energy storage, and in the process of energy storage, gear drive drives the driving pawl motion, the actuating cam axle rotates, and draws back switching-in spring by connecting lever.

2. a kind of indoor high-voltage vacuum circuit breaker as claimed in claim 1 is characterized in that: described operating mechanism also is provided with branch, switching-on mechanism.

3. a kind of indoor high-voltage vacuum circuit breaker as claimed in claim 1 is characterized in that: the contact of the vacuum interrupter in the described arc interrupter pole is a copper chromium contact, and cup-shaped is indulged magnetic structure.

4. a kind of indoor high-voltage vacuum circuit breaker as claimed in claim 1 is characterized in that: the chassis car is established in the bottom of described indoor high-voltage vacuum circuit breaker framework, promptly forms a circuit breaker cart.

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